British journal of cancer
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British journal of cancer · Jun 2021
Genetically predicted circulating B vitamins in relation to digestive system cancers.
Folate, vitamin B6 and vitamin B12 have been associated with digestive system cancers. We conducted a two-sample Mendelian randomisation study to assess the causality of these associations. ⋯ These results provide evidence to suggest that elevated serum vitamin B12 concentrations are associated with colorectal cancer.